using System;
using System.Collections.Generic;
using System.Linq;
using KdTree;
using KdTree.Math;
using ProBuilder2.Common;
using UnityEngine;

namespace ProBuilder2.MeshOperations
{
	// Token: 0x02000014 RID: 20
	public static class pb_WeldVertices
	{
		// Token: 0x060000A1 RID: 161 RVA: 0x0000CF88 File Offset: 0x0000B388
		public static pb_ActionResult WeldVertices(this pb_Object pb, int[] indices, float neighborRadius, out int[] welds)
		{
			pb_Vertex[] vertices = pb_Vertex.GetVertices(pb, null);
			pb_IntArray[] sharedIndices = pb.sharedIndices;
			Dictionary<int, int> dictionary = sharedIndices.ToDictionary();
			HashSet<int> commonIndices = pb_IntArrayUtility.GetCommonIndices(dictionary, indices);
			int count = commonIndices.Count;
			int num = Math.Min(32, commonIndices.Count<int>());
			KdTree<float, int> kdTree = new KdTree<float, int>(3, new FloatMath(), AddDuplicateBehavior.Collect);
			foreach (int num2 in commonIndices)
			{
				Vector3 position = vertices[sharedIndices[num2][0]].position;
				kdTree.Add(new float[] { position.x, position.y, position.z }, num2);
			}
			float[] array = new float[3];
			Dictionary<int, int> dictionary2 = new Dictionary<int, int>();
			Dictionary<int, Vector3> dictionary3 = new Dictionary<int, Vector3>();
			int num3 = sharedIndices.Length;
			foreach (int num4 in commonIndices)
			{
				if (!dictionary2.ContainsKey(num4))
				{
					Vector3 position2 = vertices[sharedIndices[num4][0]].position;
					array[0] = position2.x;
					array[1] = position2.y;
					array[2] = position2.z;
					KdTreeNode<float, int>[] array2 = kdTree.RadialSearch(array, neighborRadius, num);
					if (num < count && array2.Length >= num)
					{
						array2 = kdTree.RadialSearch(array, neighborRadius, count);
						num = Math.Min(count, array2.Length + array2.Length / 2);
					}
					Vector3 zero = Vector3.zero;
					float num5 = 0f;
					for (int i = 0; i < array2.Length; i++)
					{
						int value = array2[i].Value;
						if (!dictionary2.ContainsKey(value))
						{
							zero.x += array2[i].Point[0];
							zero.y += array2[i].Point[1];
							zero.z += array2[i].Point[2];
							dictionary2.Add(value, num3);
							num5 += 1f;
							if (array2[i].Duplicates != null)
							{
								for (int j = 0; j < array2[i].Duplicates.Count; j++)
								{
									dictionary2.Add(array2[i].Duplicates[j], num3);
								}
							}
						}
					}
					zero.x /= num5;
					zero.y /= num5;
					zero.z /= num5;
					dictionary3.Add(num3, zero);
					num3++;
				}
			}
			welds = new int[dictionary2.Count];
			int num6 = 0;
			foreach (KeyValuePair<int, int> keyValuePair in dictionary2)
			{
				int[] array3 = sharedIndices[keyValuePair.Key];
				welds[num6++] = array3[0];
				for (int k = 0; k < array3.Length; k++)
				{
					dictionary[array3[k]] = keyValuePair.Value;
					vertices[array3[k]].position = dictionary3[keyValuePair.Value];
				}
			}
			pb.SetSharedIndices(dictionary);
			pb.SetVertices(vertices, false);
			pb.ToMesh();
			return new pb_ActionResult(Status.Success, "Weld Vertices");
		}
	}
}